When the boundary conditions of electromagnetic quantities are satisfied, according to Maxwellfield equation the expression for Joule heat resource power can be obtained.
在满足电磁量边界条件的情况下，根据导电体的麦克斯威尔方程，得到裂纹尖端附近焦耳热源功率的表达式。
2
Maxwell showed that light was a vibration in the electromagnetic field, and that it travelled at a constant speed, c, in a vacuum.
马克思·威尔指出光是种电磁波，其在真空中的传播速度是个常数c。
3
The energy of electric field stored in the capacitor placed in an alternating electromagnatic field is concluded by using the principle of superposition and by starting with Maxwell equations.